Tricky Dicky wrote:

Classic plumbing error not considering how the floorboards are going back
when notching the joists. Since this is upstairs I do not know why you
have pipe insulation, I would remove it and see if you can bring the pipes
together and fit some blocks in to narrow the notches so a single T&G
board will span the pipes thus you can fix either side of the pipes. If
the pipe diameters will not allow that then consider what I normally do
which is to lift two boards and run the pipes on the centre line of each
board, it will probably mean you will have to re-install some of the
pipework and making good some of the excess notching.

Richard

I believe building regs require you to insulate pretty well all water
pipes nowadays, for economy reasons rather then frost protection. This
does not adversely affect your second suggestion though.



--

Roger Hayter